Crimp termination, PEEK insulation
The 1577624-1 is a 20 AWG ring terminal from the PIDG and Strato-Therm series, terminated by crimp and insulated with PEEK. It accepts wire insulation diameters from 0.045" to 0.080" (1.14mm to 2.03mm) and mates with a #10 stud. The nickel-plated copper contact is 0.032" (0.81mm) thick, and the overall length is 0.833" (21.16mm).
Same-series comparison: 133521-1
Within the TE ring terminal family, the 1577624-1 (insulated, #10 stud) differs from the 133521-1 (non-insulated, #8 stud, gold-plated, Solistrand series). The 1577624-1 uses PEEK insulation and a nickel finish; the 133521-1 is uninsulated with gold plating and a brazed seam. The 1577624-1 is a direct crimp terminal for a #10 stud; the 133521-1 fits a #8 stud.